The successful launch of Arianespace's flight VS18 furthers O3b's satellite constellation. The satellites will be operated by SES Networks to provide low latency, fiber-like connectivity in the growing mobility, fixed data and government markets.

Four additional spacecraft for SES’ O3b Medium Earth Orbit (MEO) satellite constellation were orbited by a Soyuz launch from French Guiana, supporting a long-time Arianespace customer and underscoring the medium-lift workhorse launcher’s suitability for a full range of missions.

Lifting off from the Spaceport in French Guiana, the Soyuz launcher for Arianespace Flight VS18 begins its mission to deploy four O3b Medium Earth Orbit satellites.

Departing from the Spaceport’s ELS launch complex near the city of Sinnamary, and ascending into clear skies over French Guiana, Soyuz deployed its four passengers during a flight of approximately 2 hrs., 22 min. This included the propulsion of Soyuz’ first three stages, as well as four burns of its Fregat upper stage.

Today’s launch was Soyuz’ 18th from French Guiana since it began service at the Spaceport in 2011, and was designated Flight VS18 in Arianespace’s launcher family numbering system.

O3b spacecraft are used by the SES Networks operation of SES to provide low latency, fiber-like connectivity in the growing mobility, fixed data and government markets. These trapezoidal-shaped Ka-band relay platforms, produced by Thales Alenia Space, have a liftoff mass of 700 kg. each.

Halliwell noted that SES would be back at the Spaceport in early 2019 with the next four O3b satellites.

Enhancing SES Networks’ services from orbit

The passengers on today’s flight will join the 12 O3b satellites already in orbit, launched by Arianespace using its medium-lift Soyuz workhorse that carries four spacecraft on each launch. The previous missions were performed in June 2013, July 2014 and December 2014. Positioned at approximately 8,000 km., the O3b satellites are some four-times-closer to Earth than geostationary-orbit satellites.

The four newly-launched satellites will enable SES Networks to offer more capacity, enhanced coverage, increased efficiencies and greater reliability while delivering carrier-grade services to telecommunications operators, mobile network operators, enterprises, internet service providers and government customers.

After today’s Flight VS18, Arianespace has five more SES satellites in its backlog, comprising four additional spacecraft for SES Networks’ O3b constellation, and the all-electric SES-17 — to be used by SES for high-speed inflight connectivity and high-powered data services.

Thales Alenia Space-built satellites on Flight VS18

In comments after Flight VS18, Arianespace’s Luce Fabreguettes also offered her congratulations to Thales Alenia Space, another long-time partner that produced the four O3b spacecraft lofted on today’s Soyuz mission. “With 154 Thales Alenia Space produced satellites orbited since 1981 by Arianespace, and 11 more in our backlog, we will certainly continue to partner for many common successes,” she added.

Patrick Mauté, Thales Alenia Space’s Chief Technical Officer, said the Soyuz launcher “operated like clockwork— perfectly,” and complemented the launch teams’ “skills, competency, and great talent,” adding they were the keys to today’s successful launch.

Flight VS18 was Arianespace’s second mission in 2018 with a member of its complete launcher family — which also includes the heavyweight Ariane 5 and light-lift Vega. It continues a busy year of activity for Arianespace, which has identified a total of 14 launch opportunities from the Spaceport.

Arianespace’s next mission is Flight VA242 with an Ariane 5, which will carry a dual-payload to geostationary transfer orbit (GTO) that includes the HYLAS 4 satellite for Avanti.